High power short wave transmitting apparatus



Oct. 23, 1934. c. vRANY ET AL 1,978,067

HIGH POWER SHORT WAVE TRANSMITTING APPARATUS Filed NOV. 3, 1931 5Sheets-Sheet 1 Oct. 23, 1934. c. VRANY El AL 1,973,057

HIGH POWER SHORT WAVE TRANSMITTING APPARATUS I Filed Nov. 3, 1931 5Sheets--Shee1:v 2

In Vezz Zazzs: ['ar/ l rany naw/mm 20mm Oct. 23, 1934.

C. VRANY ET AL HIGH POWER SHORT WAVE TRANSMITTING APPARATUS Filed Nov.3, 1931 3 Sheets-Sheet 5 Pat nted a. 23, 1934 r 1,978,067

g UNITED [STATES PATENT OFFICE siaos'zs 1 HIGH POWER SHORT WAvETRAN'sMITTInd v k t APPARATUS,

7 'Carl Vrany, Berlin-Lichterfelde-Ost, and Heine v rich Zodtner,Birkenwerder, near Berlin, Germany, assignors to C. LorenzAktiengesellschaft, Berlin-Tempelh of Germany Application November 3,1931, Serial No. 572,796

In Germany November 5, 1930 5 claims. (01. 250-47) The present inventionrelates to high power Fig. 5 shows a modified form of the inventionshort wave; transmitting apparatus, and more in elevation. particularlyto an improved form of construction Fig. 6 is an adaptation of theapparatus shown of the apparatus. Hitherto, transmitters have in Fig.1.i i beenbuilt up on metal frames in which the In Fig.1, the final stageof ahigh-power transelectron discharge valves and tuning members mitteremploying eight tubes is illustrated diawere arranged; Such aconstruction, however, grammatically the grid circuits being omitted hasthe disadvantage that, owing to the many for the sake of clearness, onlythe anode circuits metal parts, the capacity to earthis very great beingshown. The tubes, 1 to 8, are connected 0 and the connecting leadscannot be madeshort in such a manner that pairs of tub (1 an 2,

enough. The necessity for a small capacity to 3 and 4, 5 and 6, 7 and 8)are connected in parearthiand shortconnecting leads, becomes more allel.,The connection is moreover effected important as the wave-length isdecreased, but through the inductance coils 9 to 12 and the conit isdesirable that thesedemands should also be n rs 13 and '14- T n li inndensers met when using medium wave-lengths. 15, 16,17 and 18 haveplates common with these An object of the invention is to provide a highcondensers, The input i n rated'oscilpower short wave transmittingapparatus in latiOIlS is 6fi60ted"thT011ghthe inductance y which theelements are supported upon a single ind v up g With the coils 11 andlZ.The pillar of insulating material, anode voltage is applied at thepoint20. t 2 A further object is to provide an insulating In constructionalexample illustrated in pillar for supporting the elements of a highpower gu es 2, 3 and 4 0f the accompany g drawings, short wavetransmitting apparatus in which is the various components are indicatedby the same incorporated a channel for the supply oicooling referencenumerals as theircorresponding symbols fluid to the electron dischargetubes employed in F u 011 a P l 21 (Figs- 2 a dfi) 0f inusaidtransmitting apparatus. insulating material (preferably stoneware or 30Another object is to provide a hollow pillar for p rcelain) th r rests api a t of urs this purpose through the interior of which curpossible tom the p r 21 and 22 in 0116 p rent. supply leads pass to the elements ofthe In the example illustrated, the walls of the pedshort wavetransmitting apparatus. estal 21 have special passageways formed therein30 Another object of the invention is to provide through which the anodecooling water flows. 5 t a plurality of pillars of insulating materialeach Since the city water mains or other sources of of which supports aplurality of electron discooling water are usually at ground potentialthe charge tubes and which support conjointly furcooling water pathmustbe sufficiently long to ther elements which constitute with saidelecisolatethe plate battery. These spiral passages 3 tron dischargetubes a short wave generating set. a formed in the in$1l1ating material2 provide Still a h Object f the invention is, to a column of water toisolate the tube anodes from ,vide a pillar of insulating materialcarrying the gmnmt Q h s i P P s Ys the elements of a high power shortwave transmitcoolmg Water arfformed 1n t round b 1:119 40 ting set whichis provided with shoulders upon is gi gi 'g gf s igg g ggfgg g i fi '.eeoed .placannes 2: ;zi ti isg gg isggz 225 S mp1 y which are indicateddiagrammatically. At the upper end, connections 24 and 25 to the anodesof Furthel oblects W111 be apparent from the the tubes are provided forthis purpose. The tubes lowing description taken in conjunction with thethemselves are mounted directly on the fixed 45 accompanying drawings inwhlch: plates of the anode tuning condensers 13 and 14 1 illustratesdiagrammatically a CHOU-1t so that additional connecting leads betweenthe arrangement which may Convenienfly be anode cooling jacket and thefixed plates of the ploy d n t apparatus according to the iIWen"condensers are dispensed with. The condensers tion. themselves aredirectly fixed to the pillar 22. To 5 Fig. 2 shows an elevation of oneform of the this end, the pillar 22, as can best be seen from apparatus.the plan view in Fig. 4, has arms 26 to which Fig. 3 shows another viewpartly in section of the condensers are fixed. The shafts of the rotorsthe apparatus shown in Fig. 2. are mounted in the insulating material atthe Fig. 4 is a plan view of the apparatus shown points 27. A verycompact construction is thus v1.5 in Figs. 2 and 3. obtained and nospecial connecting leads are used.

The movement of the rotors is effected by means of a worm wheel driveoperated by a common shaft. Since the fixed plates of the condensers arearranged parallel to one another, the rotors do not interfere with oneanother. The clearance of the condensers can therefore be kept small andis determined only by the thickness of the arms 26. The neutralizingcondensers are fixed to the arms in the same way, as can best be seenfrom Fig. 3. The plates'29 of the anode condensers, as mentioned above,are common with the fixed plates for the neutralizing condensers. Thecoupling coil 19 is likewise rotatably mounted in arms 31 (Fig. 4) ofinsulating material.

A roof-shaped metal screening sheet 32 (Fig. 3) which screens the anodecircuits from the grid circuits is provided, mounted in the upper partof the pillar 22. In order that the electron tubes may beinterchangeable, the outer edge of the metal sheet may be hinged. Thehead 33 of the pillar, also has arms in which the grid-circuitcondensers and the grid-circuit tuning members are mounted, but thismounting is only diagrammatically illustrated in the drawings. It ispreferable not to make the head 33 in one piece with the pillar, but toattach it thereto. As can be seen in Fig. 4, the interior of thepillar22 is made hollow, so that the current supply leads (anodepotential) may be passed up inside.

A modifiaction of the invention, embodying im provements upon thearrangement described and particularly suitable for discharge tubes ofvery high power, for instance, 150 kw. will now be described. Accordingto this feature of the invention, the clamps or the like by which thetubes are fixed to the porcelain pillar in the construction shown inFigs. 2 to 4, are replaced by arms with which the pillar is provided andon which the tubes and other heavy parts of the transmitter rest. It isthen necessary only to protect the tubes from falling over. Thisarrangement has the advantage that the entire weight of the tubes isborne by the arms and that metal fixing members, which would otherwisebe necessary, are dispensed with.

A constructional arrangementis shown by way of example in Figs. 5 and 6.The pillar S is provided on its lower portion with arms A on which theanode cylinders of the discharge tubes R stand. In order to prevent thetubes falling over, the clamps L are provided. As can be seen from Fig.5, the upper portion of the pillar S thereby becomes very narrow, bywhich means it is also possible to economize in material. On the head ofthepillar are arranged the grid-circuit members G which are screenedoff; furthermore, measuring instruments may be provided, as indicateddiagrammatically in the figure.

In Fig. 6 is shown the side view of an arrangement where two pillars arearranged side by side. Such an arrangement is provided for instance,when two normally operating tubes and two reserve tubes are provided. Inthis case it is of advantage, according to a further feature of theinvention, to support the transmitter parts, for in stance, asillustrated, the grid circuits G by both pillars at the same time.

" We claim:-

1. High power short wave transmitting apparatus comprising thecombination of a short wave generating set including at least oneelectron discharge tube, and a pillar of insulating material supportingsaid set, said pillar incorporating a channel for the supply of coolingfluid to the electron discharge tube.

2. High power short wave transmitting apparatus comprising thecombination of a pillar of insulating material, electron discharge tubesmounted on said pillar, said pillar incorporating a channel for thesupply of cooling fluid to the anodes of said electron discharge tubes,

condenser plates mounted in parallel relation on said pillar, said tubesbeing directly secured by their anodes to said condenser plates.

3. High power short wave transmitting apparatus comprising thecombination of a pillar of insulating material, having fluid cooledanodes, said pillar incorporating a channel for the supply of coolingfluid to said anodes, a plurality of projecting arms on said insulatingpillar, and rotatable tunelectron discharge tubes 7 ing membersjournalled in said projecting arms.

4. High power short wave transmitting apparatus comprising thecombination of a short wave generating set including electron dischargetubes having fiuid cooled anodes, a hollow pillar of insulating materialsupporting said set, the walls of said pillar incorporating a channelfor the supply of cooling fluid to said anodes and current supply leadspassing through the interior of said pillar.

5. High power short wave transmitting apparatus comprising thecombination of a hollow pillar of insulating material, a plurality ofcondenser plates arranged in parallel relation on said pillar, electrondischarge devices supported by their anodes on said condenser plates,the walls of said pillar incorporating a channel for the supply ofcooling fluid to the anodes of said electron discharge tubes, andcurrent supply leads passing through the interior of said pillar.

CARL VRANY. HEINRICH ZODTN ER.

